/*******************************************************************************
 * Copyright (c) 2014 Michal Dabski
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ******************************************************************************/
package com.michaldabski.utils;

import android.view.View;
import android.view.ViewGroup;

/***
 * Traverse layout tree one view at a time
 * @author Michal
 *
 */
public class ViewTraverser
{
	public interface ForeachAction<T>
	{
		void onElement(T element);
	}
	
	private final View root;
	
	public ViewTraverser(View root)
	{
		this.root = root;
	}
	
	public void traverse(ForeachAction<View> foreach)
	{
		traverse(root, foreach);
	}
	
	protected void traverse(View root, ForeachAction<View> foreach)
	{
		foreach.onElement(root);
		if (root instanceof ViewGroup)
		{
			ViewGroup viewGroup = (ViewGroup) root;
			for (int i = 0; i < viewGroup.getChildCount(); i++)
			{
				traverse(viewGroup.getChildAt(i), foreach);
			}
		}
	}
}
